Power take-off



mi l0, 195i R. w. WAGNER 254mg@ POWER TAKE-OFF Fiied Jan. 3, 1948 2 Sheets-Sheet April 10, 1951 R. w. WAGNER 2,548,182

PowER 'rAxEoFF Filed Jan. 3, 1948 .2 Sheets-Sheet 2 Patented pr. 10, 1951 UNITE Df STAT `OF FICE asienta A RoWEnTAKE-OFF Rolert `W; ,Wa-gnet, Chelsea, lVI-ch.'4V Application'janu'ary 3, 1948, Seriali-1510;.455Vv This invention relatesV to power take-off d'e vices for connection` with a main driving source, and is more particularlyl concernedv with; such,

power take-01T devices as arer employed for atl-- tachment to motor vehicles, suchas to motor trucks or tractors or tot automobiles; generally.; and which are/capables of being connected-with` the transmission thereof so asto. provide a read-A ily available power sourcefor operating.external a power take-off device irr` Whichgseparate power.

takeaoffshafts are under. the control of a sim;-l

power take-off; shafts;` canloewalternatelyconen nected; telcel` driven or he hoth` disconnected; from` a common l driving gear so,` as ,tor secure a neutra-l1 or inoperative condition ofthe; device asfawhole'.

Other objects and advantages ofi the:` inven-r tion; will` be: rendered clear from: ah consideration f the following; description. of' oneypracticalfem bodiment of the inventi0n; lov=` wayofr example only, and with reference to the acconripanying-v drawings inwhich:

Fig. I is a plan View offonefpractical` embodiment of the in ventiomwithv the gearing shown in the neutral condition,`

Fig. II is an` end, elevational` Viewv 0f Fig, I,y and r Y Fig. III is a planview of thegearingl and; shift gear mechanism. y ,y

In carrying thev invention intoeffect, accord` ing' to one practical embodiment thereof shown in the `drawings a. power take-off device is pro vided which comprises a` hollow casing, I havingf` on opposite sides thereof pairs of opposed jour-A nal bosses 2, 3-for the rotatable mountingthere-` in, by suitable bearings, of a pair of parallel and. spaced shafts 4, 5. each having a splnedfpor-` tion 4a, 5a upon which there islmounted` alspur gear 'I axially slidable alongv the splinedpor.- tions of their respective shafts 4, 5j..

Each shaft,at. one end` 4b, 5bfth'er,eof ter-V minates ,within its respective boss. `2, 3 ofthe housing and at! 'itsppposite end. a portion 4c, 5c, wl`ii'ch.proj'ect`sy outside the, housing and;

rangement is'i suchA that. aportion of the gear. I0]

projects outside the. housing, asshown in. li'g.` II,v while the remainder ofthegear iscontained within the hollow interior of" the-housing in position to have meshing engagementwitheither ofthe two spur. gears L5` The arrangement also providesV for'the obtaining ofa neutral con'- dition in which neither splntgearV 4, 5 isengagect with the gear` |0 and, the latter, therefor; then functions merely as.4 an idler gear'. l

This power' take-olf `device provides, therefore; two separate shaftsv 4; ilv by whichA a driving con'- nection can bem-ade. with two independentforms of equipment, 'such as a compressor andanother piece off'apparatus and either" of which?I shafts can be coupled at willl tothe particular piece" of apparatus tot bei driven therefrom.v

Toefiect thev desiredv driving' condition shifter` gear mechanism is provided consisting` of aflplate common circl'elin circumferentall-y* spaced reflationship as shown particularly in Fig. IIT.V These circular; extremitiesY I'Gf of*J the pivotefi-` shifterplate |`2"'are-eri`gaged irl-"forks ls-formed ori' the-'inside' ofpair of boss members I Sesldf ablyrnountd infopposed relationship upon .ai pair of xedor non-rotary'spindles 2B' secured in thel opposite sidewallsl'ofthe casing` upon`V oppositesidesA of' the shifter plate and in over: headvv orspaced' relationship to' the gear and take-ofi" shafts #and 5:v

rections along itsresp'ective spindle 2'll"uncler'the`4 control of the oscillatable shifter plate I2 and eachv boss is formed with ai pair o'f'spacedv side plates 2l formingforksA between theminto which the gears ian'd` 'l'extend'sothat'these gears are engaged on theirA opposite faces by these sideE plates 21 ofE their: respective such forks.'

cor-i-venien'tlyl off semi-circula-r shape, asf shown, an@ centrally pivotedasindicated* gen-- erally at I3, upon the inside-of the closedendf wall?, M# ofthe'casifngl and'having-y oppositellyfdirected diametricalfearsv having circulfarexfi t'remities Iliirandg" onf the inside face; thereof, erA seriesv ofi circular'A pockets*A l1 disposed uponN a- As already indicated, the gears 6 and 1 are slidable upon their shafts 4 and 5 and the construction and arrangement is such that oscillation of the shifter plate l2 will produce a corresponding sliding adjustment of these gears in opposite directions along their respective shafts by the action of the fork arms 2| with the result that either gear can be brought, at will, into meshing and driving engagement with the intermediate and driving gear l or both gears 6 and 1 can be adjusted to a neutral position in which both gears are out of engagement with the gear I6 and the latter then functions as an idler gear. The desired oscillatory motion of the shifter plate l2 can be arranged to be effected by the actuation of a lever 22 pivotally mounted, as indicated at 23 in Fig. II upon the outside of the closed end wall I4 of the casing l. This lever can be operatively connected by a suitable flexible connection, after the manner of the well known Bowden wire connection, for the control of the shift lever and associated mechanism from a remote position, such as from the dash or instrument board of a vehicle to which the power takeoff device is aiiixed. Such aiiixing is capable of being readily effected by fitting the flange 24 of the open end of the casing about an opening in the transmission housing (not shown)` through which the gear l0 extends and securing the casing in position by suitable securing and studs inserted through the holes 25 in the said flange.

A ball 26 loaded by a spring 21 (Fig. II) and located for engagement with the pockets Il in the shifter plate I2 serves to provide some degree of definition to indicate when a certain adjustment of the gearing has been effected, the engagement of the ball with the central pocket corresponding to neutral and the engagement of the ball with either of the outside pockets indicating that the right or left power take-ofi" shaft is engaged for driving purposes.

Having thus described one practical embodiment of the invention, it being understood that other embodiments of modified detail are possible, what I claim is:

1. A power take-off transmission device comprising in combination, a hollow casing structure .having opposed side walls, a first shaft terminating in said casing. side walls, a driver gear wheel on said first shaft and within said casing, a pair of power take-off shafts terminating at one end in one said casing side wall and extending at their opposite ends beyond the outside of the opposite casing side wall, said power take-olf shafts being parallel with each other and with said first shaft and the latter being centrally mounted with respect to said power take-off shafts in off-set relationship thereto, bearing means rotatably mounting said power take-off shafts upon the casing, a gear Wheel on each said power take-off shaft in rotary engagement therewith and within said casing in positionto have selective driver engagement with said driven gear wheel, means mounting each said take-off shaft gear wheel upon its shaft for axial adjustment therealong, and combined shifter and selector mechanism symmetrically mounted on said casing with respect to said shafts and upon the opposite side of said power take-off shafts to said driver shaft, said combined shifter and selector mechanism being operatively associated with said gear wheels on the power take-off shafts to shift said gear wheels simultaneously in opposite directions for their selective engaging and dis-engaging relationship with respect -to said driver gear Wheel.

amarga'` 2. A power take-o transmission device coniprising in combination, a hollow casing structure having opposed side walls and a closed end and an opposite open end, a rst shaft adjacent said open casing end and terminating in said casing side walls, a driver gear wheel on said rst shaft and within said casing said driver gear being exposed through said open casing end, a pair of power take-off shafts terminating at one end in one said casing side wall and extending at their opposite ends beyond the outside of the opposite casing side wall, said power take-off shafts being parallel with each other and With said iirst shaft and the latter being centrally mounted with respect to said power take-off shafts in off-set relationship thereto, bearing means rotatably mounting said power take-off shafts upon the casing, a gear wheel on each said power take-off shaft and within said casing in position to have selective driven engagement with said driver gear wheel to drive their respective power take-01T shafts, means mounting each said take-off shaft gear wheel upon its shaft for axial adjustment therealong,

Y and combined shifter and selector mechanism symmetrically mounted on said casing with respect to said take-off shafts and upon said closed casing end and operatively associated with said power take-off gear wheels to shift the latter simultaneously in opposite directions for their selective engaging and dis-engaging relationship with respect to said driver gear.

3. A power take-off transmission device comprising in combination, a hollow casing structure having opposed side walls, a closed end wall and an open end wall, a first shaft terminating in said casing end walls adjacent said open end wall, a driver gear wheel on said first shaft and within said casing, said driver gear wheel being exposed to said open end wall, a pair of power take-off shafts terminating at one end in one said casing side Wall and extending at their opposite ends beyond the outside of the opposite casing side wall, said power take-off shafts being Vparallel with each other and with said rst shaft and the latter being centrally mounted with respect to said powertake-off shafts in off-set relationship thereto, bearing means rotatably mounting said power take-off shafts upon the casing, a gear wheel on each said power take-off shaft and within said casing in position to have selective driven engagement with said driver gear wheel to drive their respective power take-olf shafts, means mounting each said take-off shaft gear wheel upon its shaft for axial adjustment therealong, and combined shifter and selector mechanism mounted on said closed casing end wall and operatively associated with said power take-off gear wheels to shift the latter simultaneously in opposite directions for their selective engaging and dis-engaging relationship with respect to said driver gear, said mechanism comprising an angularly adjustable member symmetrically mounted on the inside of said casing end wall 'with respect to said take-off shafts, an outside actuator for said member, the latter having an operative axial sliding adjustment connection with both said gear wheels on the power take-off shafts, and automatically operable locator means tending to arrest movement of said angularly adjustable selector member at spaced intervals corresponding to gear engaged and neutral positions.

v4. A power take-off transmission device comprising in combination, a hollow casing structure having opposed side walls, a closed end wall and an opposite open end wall, a first shaft terminating in said casing side walls adjacent said open end wall, a driver gear wheel on said rst shaft and exposed through said open end wall, a pair of power take-off shafts terminating at one end in one said casing side wall and extending at their opposite ends beyond the outside of the opposite casing side wall, said take-off shafts being parallel with said rst shaft in off-set relation thereto, said rst Vshaft being centrally located with respect to said take-off shafts on the side of the latter adjacent to said open end wall, bearing means rotatably mounting said power takeoff shafts upon the casing, a gear wheel on each said power take-off shaft and within said casing in position to have selective engagement with said driver gear wheel, means mounting each said take-off shaft gear wheel upon its shaft for axial adjustment therealong but in rotatable engagement with its respective power take-off shaft and combined shifter and selector mechanism on said casing and operatively associated with both said gear wheels on the power take-off shafts to shift said gear wheels simultaneously in opposite directions for their selective engaging and disengaging relationship with respect to said driver gear, said mechanism comprising an angularly adjustable selector plate member pivotally mounted on the inside of said closed end casing wall in symmetrical relationship t0 said power take-off shafts, an actuator lever for said selector plate 6 mounted upon the outside of the casing, a pair of lay shafts mounted in said 'casing side walls in parallel and off-set relationship to said takeolf shafts, a rocker member on each said lay shaft and operatively connected one with each gear wheel on the power take-oli" shafts as well 'as with said selector plate, whereby adjustment of the latter is translated by said rocker members into an axial adjustment of said gear wheels, said selector plate having three defined positions corresponding to the engaged condition of each said gear wheel and neutral.

ROBERT W. WAGNER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,230,661 Brown June 19, 1914 1,247,229 Corwin Nov. 20, 1917 1,321,293 Drake Nov. 11, 1919 2,231,144 Wagner Feb. 11, 1941 2,443,313 Gerst June 15, 1948 FOREIGN PATENTS Number Country Date 462,164 Great Britain Mar. 3, 1937 

